/*
 * Copyright 2013-2015 www.snakerflow.com. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law
 * or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language governing permissions and limitations under the License.
 */
package org.snaker.engine.impl;

import org.snaker.engine.ITaskService;
import org.snaker.engine.SnakerEngine;
import org.snaker.engine.SnakerInterceptor;
import org.snaker.engine.core.Execution;
import org.snaker.engine.entity.Task;
import org.snaker.engine.helper.StringHelper;

import com.ajaxjs.util.CommonUtil;

/**
 * 委托代理拦截器 负责查询wf_surrogate表获取委托代理人，并通过addTaskActor设置为参与者 这里是对新创建的任务通过添加参与者进行委托代理(即授权人、代理人都可处理任务) 对于运行中且未处理的待办任务，可调用engine.task().addTaskActor方法
 * {@link ITaskService#addTaskActor(String, String...)}
 * 
 * @author yuqs
 * @since 1.4
 */
public class SurrogateInterceptor implements SnakerInterceptor {
	public void intercept(Execution execution) {
		SnakerEngine engine = execution.getEngine();

		for (Task task : execution.getTasks()) {
			if (task.getActorIds() == null)
				continue;

			for (String actor : task.getActorIds()) {
				if (StringHelper.isEmpty(actor))
					continue;

				String agent = engine.manager().getSurrogate(actor, execution.getProcess().getName());

				if (!CommonUtil.isEmptyString(agent) && !actor.equals(agent))
					engine.task().addTaskActor(task.getId(), agent);
			}
		}
	}

}
